Grinding machine



1935' G. w. BINNS 2,025,714

- GRINDING MACHINE v Filed June 7, 19:52 4 Sheets-Sheet -2 Dec. 31,1935. I w, B|NN5 2,025,714

GRINDING MACHINE I Filed June 7, 1952. 4 Sheets-Sheet 3 Dec. 31, 1935.aw. BINNS enmnme mcrmm Filed June 7, 1932.

4 v Sheets-Sheet 4 ulnhulllll Patented Dec. 31, 1935 t i r 2 025,714,

\ UNITED STATES PATENT OFFICE GRINDING MACHINE George W. Binns,Cincinnati, Ohio, assignor to Cincinnati Grinders Incorporated,Cincinnati, hio, a corporation of Ohio Application June 7, 1932, SerialNo. 615,863

20 Claims. (01. 51-129) This invention relates to machine tools andessimilar reference characters are employed to depecially toimprovements in grinding machines. note the same or similar parts.

An object of the invention is the provision of A machine embodying thisinvention may-coman automatic centerless grinder for grinding the prisea bed l0 having formed on its upper surface terminal portion of workpieces such as headed a guideway II for a slide l2 which in turn is 5studs, tappets and the like. provided with a guideway l3 for a bracketor Another object of the invention is the proviupper slide M. The bedIII has further rising sion of improved means for actuating the saidtherefrom at one side thereof a pedestal bearing flat surfaces of thehead or stud relative to the IS in which is journaled a spindle. I6 fora grind- 0 grinding wheel while the work piece is being roing wheel I1.The upper slide or bracket I4 has tated. u d to it a h us ng or head l8in whichis A further object of the invention is the projournaled aspindle l9 to the end of which is vision of improved feeding andejecting means secured a wheel 20. The wheel 20,-see Figure 3, forproperly positioning a work piece on a supis provided in its peripherywith a notch 2| havport and ejecting it therefrom at the concluing oneach side thereof vertical faces 22 and 23. sion of the grindingoperation. From the point 24 0f the face 23 the periphery 25 Otherobjects and advantages of the present of the wheel gradually rises,which rise termiinvcntion should be readily apparent by referhates at apoint 26 from which the periphery. 21 ence to the followingspecification consideredvin is substantially concentric with the axis ofthe conjunction with the accompanying drawings, spindle 19. Thisconcentric periphery terminates 20 forming a part thereof, and it is tobe understood at a point 28 where it joins the verticalface 22. that anymodifications may be made in the exact Thegrinding w eel I] d regulatinWheel structural details there shown and described withare respectivelyrotated at a high grinding rate in the scope of the appended claims,without deof speed and a slow work controlling rate ofis v the work,while the latter controls the rotation In the drawings: of the work andfeeds same relative to the grind- Figure 1 is a front elevation of acenterless ing wheel. The wheels are spaced from one angrinding machineembodying the improvements other to forma work receiving throat in whichof this'invention. the work piece is positioned. In order to support 30Figure 2 is a top pl n View f the machine shown the work in the grindingthroat, there is provided in Figure 1. a work rest blade 29 having aninclined operative Figure 3 is a fragmentary longitudinal sectionalsurface 30 which inclines in the direction of the a view through themachine particularly illustratperiphery of the wheel 20; The work restblade 29 ing the grinding throat as seen from line 33 on. is secured ina block 3| mounted on the end of a v Fi ure 2; supplementary slide 32which has formed on its Figure 4 is an enlarged fragmentary elevationalunder surface a dove-tailed guideway 33 receivview of the parts shown inFigure 3 which form n a rrespond y s ap d ton ue 34 formed the grindingthroat, on the upper surface of the lower slide l2. The

parting from or exceeding the spirit of the in speed, the formereffecting the stock removal from 25 Figure 5 is an enlarged transversesectional block 3| has projecting -from its forward face cars viewthrough the machine as seen from line 5-5 u 35 through w c Passes '8-PiVOt D 35 o Figure 2, passing also through a bell crank lever 31. The

Figure 615 an enlarged fragmentary g-, lever 31 has rotatably mounted atone end of its View of the parts as seen from line on one aim 38 apressureroller 39 which is adapted ure 5.

Figure 7 is an end elevation! View of the regw periphery of the wheel20. The other arm 4| of lating or control wheel and parts associatedthereh bell crank 31 is nkgwise pmvlded on its end with as Seen from m eon Figure v with a roller 42 which co-operates with a cam 30 Figure 8 isan enlarged Section 81 View through carried by thewheel 20 for removiugthe pressure roller 39 from the work at the time a new work piece istobe positioned in the grinding throat. In order to actuate the lever 31about the axis of its pivot 36, the arm *4 I has secured at 43 one endof a spring 44 which has its other end secured at the grinding wheel andnose of the grinding wheel spindle illustrating a mechanism whereby thesaidwheel is adjusted toward the work to take up for wear on the wheel,I

Throughout the severalviews of the drawings 45 to the slide 32, andtends tooscillate the bell 55 to engage the work 40. and hold sameagainst the crank in a clockwise direction or toward the Wheel 20.

For positioning and adjusting the wheel 20 relative to the grindingwheel in accordance with the particular work piece being operated upon,the

upper slide or bracket M has secured therein a nut 46 in threadedengagement with an adjusting screw 41 which has its rear end rotatablyjournaled in a bracket 48 carried by an extension 49 of the bed l0.Secured to the projecting portion of the screw 41 beyond the bracket 48is a pilot or hand wheel 50 whereby the adjusting screw 41 is actuated.In order to shift the upper andv lease of clamp 5| secure the lowerslide |2 to the bed so that the upper slide may be adjustedindependently.

From the foregoing description of the wheel 20 it will be noted that thevertical face 23 shifts the work intoposition for engagement with thegrinding wheel whereupon the eccentric portion 25 feeds the workrelative to the wheel at the normal feeding speed until the concentricportion 2'! is reached. At this time relative-movement between the workand grinding wheel is held in abeyance to permit sparking out of thegrinding wheel; and work and to provide the desired finish on the work.Upon reaching the point 28 the vertical face 22 effects a rapidwithdrawal of the work from the grinding wheel until it reaches thedischarge notch 2| whereupon the work is carried from the machine anddisposed in a suitable receptacle placed for its reception. In orderwith the movement of the work. For this reason the slide 32 has pivotedto it by means of the pin 53 one end of a lever 54. This lever 54 ispivoted at 55 intermediate its ends to a lug or ear 56 projecting fromthe head or housing I8. An antifriction roller 51 is rotatably carriedby the upper end of the lever 54 and is adapted to be received in camtrack 58 formed on the rear surface of the wheel 29. The cam track 58bears a definite relation to the periphery of the wheel 20 so that asthe said periphery shifts the work 40 toward the grinding wheel, itlikewise shifts the slide 32 so that the blade 29 is at all timesbeneath the -Work and rotatably supporting it during the Figures 5, 6and 7, the hopper mechanism terminates in a fixed guide or support 6|!on which is slidably reciprocated a slide 6|. The slide 6| is adapted tobe shifted from the position shown in Figure 5 into the grinding throatand retracted therefrom once for each rotation of the wheel 29.

Thisreciprocation of the slide 6| takes place during a very smallportion of a single rotation of the wheel 20 and for which purposesuitable mechanism is mounted in the base of the hopper 59 and formingno part of this invention, it being comes into play. .In order toposition a work piece onthe reciprocating slide 6| a ram head 62 isprovided which disposes successive work pieces on the slide with one endthereof behind a shoulder 63 formed on the slide 6| which shoulder 5acts as a pusher for the work as the slide is moved.

The work rest block 3|, see Figure 6, has secured to its side an arm 64rising upwardly above the work rest blade 29 and terminating in a head65. Astripper latch 66 is pivoted at 61 to the head 65 of the arm 64which stripper has connected to it one end of a spring 68, the other endbeing connected to the head 65. The spring 68 tends to oscillate thestripper. in a clockwise direction or with its stripping point towardthe work rest blade. A pin 16 projects from the head 65 to limit theclockwise oscillation of the stripper 66.

The operation of these parts is as follows: As the slide 6| movesforward with the rear end of the work piece butting the shoulder 63, theforward or head end of the work engages the stripper nose 69, which aswill be noted in Figure 5, has a tapered side acting as a cam to raisethe stripper nose above the head of the work as it is pushed into thegrinding throat. As soon as the head passes beyond the nose 69 thespring 68 expands to return it to its normal position so that uponretracting movement of the slide 6|,

the nose 69 engages behind the head holding the work against retractivemovement as the slide 6| is retracted. Continual retraction of the slide6| permits the work to be dropped onto the inclined surface 30 of theblade 29. The parts are so timed that as the work drops onto the surface36 the point 24 of the periphery of the wheel 20 is in position toprevent inadvertent discharge of the work from the blade throughgravity.

As was noted above, the pressure roller 39 must be rendered inoperativeduring the loading of a new, unfinished work piece within the throat.For this reason the wheel 20 has secured thereto a segmental camplatehaving a rapidly rising cam surface 12 terminating in atrack I3concentric. with the axis of the wheel 20. As the cam 12 engages theroller 42 the bell crank 31 is oscillated in a counter-clockwisedirection about the axis of the pivot 36 for disposing the pressureroller 39 in the position shown in Figure 3. The roller is held in thisposition by the track 13 during the loading of the work.

In order that the new work piece be fed into the grinding throat at thetime the parts are in the position to receive same, the wheel 26 hassecured'to its forward face atripping cam 14 adapted to engage the nosel5 of a pivotally mounted crank 16 pivoted at 11 to a bracket 18 mountedon the upper surface of the slide |2. The other end of the crank 16 haspivoted to it at 19 a link 80 which trips off the hopper actuatingmechanism mounted within the base of the hopper above referred'to.

The lower slide 32 has secured to its upper surface a bracket 8| by.means of a bolt 82 and has adjustably mounted in its upper end a stopmember 83 here shown as a screw whereby the operative position of itsnose 84 may be adjusted. A lock nut 85 is provided for securing the stopin amusted positions and for holding same against inadvertent movement.The nose 84 insures a definite stop against which the work piece isfedand held by means of the pressure roller 39. This roller, as shown inFigure 5, has its axis disposed at an angle or skewed to the axis 76 ofthe work 40 and tends to exert a feeding component on the work in thedirection of. the grinding wheel which is limited as above noted by thenose 84.

As is well known, grinding wheels are subjectv to wear and mustperiodically be trued to maintain a clean sharp face and must beadjusted to take up for this wear and truing. As shown in Figure 8, thegrinding wheel II is carried by a collet 88 which is keyed as at 81 to asplit sleeve 88. The sleeve 88 is in turn keyed at 88 to the taperednose 98 of the grinding wheel spindle IS. The spindle nose 88 terminatesin. a reduced threaded portion 8| receiving a nut 82 which has its innerend butted against a shoulder formed by a counterbore in the sleeve 88.Actuation of the nut 92 toward the left, as seen in Figure 8,

minating in a head 94 received in a slot 95 formed in the sleeve 88. Ascrew driver slot 88 is formed in the head 84 so that the screw may bereadily rotated. It is believed that the adjustment of the grindingwheel l'l relative to the spindle IE will be readily appreciated fromthe foregoing description and by reference to Figure 8.

It should be noted that there has been provided a centerless grindingmachine for grinding the flat surface of headed articles such as tappetsand the like in an automatic, expeditious manner, which insures not onlythe proper finish on the work, but also that the work will be hel withinclose limits of accuracy.

What is claimed is:

1. In a grinding machine for grinding the terminal portion of acylindrical work piece the combination of a grinding wheel having anoperative lateral or side face, a rotatable cam shaped friction controlwheel laterally offset relative to the grinding wheel on the side of itsoperative lateral side face and having its operative surface so formedas to feed the work relative to the side face of the grinding wheel andpresent the entire terminal portion of the work to the grinding wheelduring asingle revolution of the friction control wheel, and a worksupport for peripherally supporting the work while'in contact with thecam shaped friction control wheel and during the grinding of itsterminal portion. a

2. In a grinding machine for grinding the terminal portion of acylindrical work piece the combination of a grinding wheel having anoperative lateral or side face, a rotatable cam shaped friction controlwheel laterally offset relative to the grinding wheel on the side of itsoperative lateral side face and having its operative surface so formedas to feed the work relative to the side face of the grinding wheel andpresent the entire terminal portion of the work to the grinding wheelduring a'single revolution of the friction control wheel, a work supportfor peripherally supporting the work while in contact with the camshaped friction control wheel and during the grinding of its terminalportion, and means for holding the work on the work support and incontact with the operative surface of the cam shaped regulating wheel. I

3. In a grinding machine for grinding the terminal portion of acylindrical work piece the combination of a grinding wheel having an op-5 erative lateral or side face, a rotatable cam shaped friction controlwheel laterally ofiset relative to the grinding wheel on the side of itsoperative lateral side face and having its operative surface so formedas .to feed the work relative to the side face of the grinding wheel andpresent the entire terminal portion of'the work to the grinding wheelduring a single revolution of the'friction control wheel, a work supportfor peripherally supporting thework while in contact with the cam shapedfriction control wheel and during the grinding of its terminal port-ion,means for holding the work on the work support a and in contact with theoperative surface of the cam shaped regulating wheel, and means forsuccessively placing a work piece on the work sup porting mechanismadjacent the face of the regulating wheel.

4. In a. grinding machine for grinding the ter minal portion of acylindrical work piece the combination of a grinding wheel having anoperative lateral or side face, a rotatable cam shaped friction controlwheel laterally offset relative to the grinding wheel on the side of itsoperative lateral side'face and having its operative surface so formedas to feed the work relative to the side face of the grinding wheel andpresent the entire terminal portion of the work to the grinding wheelduring a single revolution of the friction control wheel, a work supportfor peripherally supporting the work while in contact with the camshaped friction control wheel and during the grinding of its terminalportion, means for holding the work onthe work support and in contactwith the operativesurfa-ce of the cam shaped regulating wheel, means forsuccessively placing a work piece on the work supporting mechanismadjacent the face of the regulating wheel, and means synchronizing theoperation of the .last mentioned means with the rotation of theregulating wheel whereby a single work piece is disposed on the worksupporting mechanism for each complete rotation of the friction controlmember.

5. In a centerless grinder for grinding the terminal portion ofcylindrical articles ,the combination of a grinding wheel, an opposedcontrol and feeding wheel, a work rest blade adjacent the periphery ofthe control and feeding wheel and forming between them a work receivingthroat, means yieldably urging the work into contact 5.3 with'thecontrol wheel while within the work receiving throat, means renderingthe yielding holding means inoperative, and means feeding work piecesinto thework receiving throat when the yielding means is inoperative.

6. In a centerless grinder of the class described the combination of agrinding wheel, an opposed control wheel, said wheels being operatedrespectively at a high grinding rate of speed and a relatively slow workcontrolling and feeding rate of speed, the control wheel having acutaway portion, an eccentric feeding portion and a notched d schargingportion, a workrest blade adjacent the periphery of the wheel forsupporting a work piece while in peripheral engagement with the wheel,yieldable pressure means for holding the work in contact with the workrest blade and perlphery of the control wheel, said pressure meanslimiting the movement of the work toward the grinding wheel.

7. In a centerless grinder of the class described the combination of agrinding wheel, an opposed control wheel, said wheels being operatedrespectively at a high grinding rate of speed and a relatively slow workcontrolling and feeding rate of speed, the control wheel having acutaway portion, an eccentric feeding portion and a notched dischargingportion, a work rest blade adjacent the periphery of the wheel forsupporting a work piece while in peripheral engagement with the wheel,yieldable pressure means for holding the work in contact with the workrest blade and periphery of the control wheel, said pressure meansexerting a feeding component on the work axially thereof toward thegrinding wheel, means for limiting the movement of the work toward thegrinding wheel, a feed slide shiftable into overlying relation with thework rest blade for placing a work piece on the blade, and means abovethe work rest blade for stripping the-work from the slide uponretraction thereof.

8. In a centerless grinder of the class described the combination of agrinding wheel, an opposed control wheel, said wheels being operatedrespectivey at a high grinding rate of speed and a relatively slow workcontrolling and feeding rate of speed, the control wheel having acutaway portion, an eccentric feeding portion and a notched dischargingportion, a work rest blade adjacent the periphery of the wheel forsupporting awork piece while in peripheral engagement with the wheel,yieldable pressure means for holding the work in contact with the workrest blade and periphery of the control wheel, said pressure means.

exerting a feeding component on the work axially thereof toward thegrinding wheel, means for limiting the movement of the work toward thegrinding Wheel, a feed slide shiftable into overlying relation with thework rest blade for placing a work piece on the blade, means above thework rest blade for stripping the work from the slide upon retractionthereof, and means retracting the pressure roll during the shifting ofthe slide into overlying relationship with the blade.

9. In a centerless grinder of the class described the combination of agrinding wheel, an opposed control Wheel, said wheels being operatedrespectively at a high grinding rate of speed and a relatively slow workcontrolling and feeding rate of speed, the control Wheel having acutaway portion, an eccentric feeding portion and a notched dischargingportion, a work rest blade adjacent the periphery of the wheel forsupporting a work piece while in peripheral engagement with the wheel,yieldable pressure means for holding the work in contact with the Workrest blade and periphery of the control wheel, said pressure rollexerting a feeding component on the work axially thereof toward thegrinding wheel, means for limiting the movement of the work toward thegrinding wheel, a feed slide shiftable into overly! ing relation withthe work rest blade for placing a work piece on the blade, means abovethe work rest blade for stripping the work fromthe slide upon retractionthereof, means retracting the pressure roll during the shifting of theslide into overlying relationship with the'blade, and meanssynchronizing the rotation of the control wheel with the retraction ofthe pressure roll and the shifting of the feed slide.

10. In a grindingmachine of the class de scribed for grindingcylindrical work pieces the combination of a grinding wheel, a work restblade for peripherally supporting a work piece, a carrier for the workrest blade mounted on the bed for movement relative thereto, a rotatablecam shaped control wheel for controlling the I rotation of the work andfeeding it relative to 5 the grinding wheel to eflect a stock removaltherefrom, and means for shifting the work rest blade carrier toward thegrinding wlieel simultaneously with the shifting of the work relative tothe grinding wheel to support the work during the grinding operation.

11. In a grinding machine of the class described for grindingcylindrical work pieces the combination of a grinding wheel, a work restblade for peripherally supporting a work piece, a carrier for the workrest blade mounted on the bed for movement relative thereto, a rotatablecam shaped control wheel for controlling the rotation of the work andfeeding it relative to the grinding wheel to effect a stock removaltherefrom, and means for shifting the work rest blade carrier toward thegrinding wheel simultaneously with the shifting of the work relative tothe grinding wheel to suport the work during the grinding operation,including a cam rotatable in timed relation with the rotation of thecontrol wheel, and a link between the blade carrier and cam. 12. In agrinding machine of the class described for grinding cylindrical workpieces the combination of a grinding wheel, a work rest blade forperipherally supporting a work piece, a carrier for-the work rest blademounted on the bed for movement 'relative thereto, a rotatable camshaped control wheel forcontrolling the rotation of the work and feedingit relative to the grinding wheel to eifect a stock removal therefrom,means for shifting the work rest blade carrier toward the grinding wheelsimultaneously with the shifting of the work relative to the 40 grindingwheel to support thework during the grinding operation, including a camrotatable in timed relation with the rotation of the control wheel, anda link between the blade carrier and cam, and a yieldably actuatedpressure roll carried by the carrier for yieldably holding the Work incontact with the work rest blade and the periphery of the control wheelduring the shifting of the work while being operated upon.

13. In a grinding machine of the class described for grindingcylindrical work pieces the combination of a grinding wheel, a work restblade for peripherally'supporting a work piece, a carrier for the workrest blade mounted on the bed for movement relative thereto, a rotatableearn shaped control wheel for controlling the rotation of the work andfeeding it relative to the grinding wheel to effect a stock removaltherefrom, means for shifting the work rest blade carrier toward thegrinding wheel simultaneously with the shifting" of the work relative tothe grinding wheel to support the work during the grinding operation,including a cam rotatable in timed relation with the rotation of thecontrol wheel, and a link between th blade carrier and cam, a yieldablyactuated pressure roll carried by the carrier for yieldably holding thework in contact with the work rest blade and the periphery of thecontrol wheel during the shifting of the work while being operated upon,said pressure roll having its axis skewed as respects the axis of thework for feeding the work at an angle to the movement thereof aseffected by the cam shaped control member and means for limiting saidangular movement of the work.

14. In a grinding machine for grinding cylindrical work pieces thecombination of a'bed, a grinding wheel rotatably mounted on said bed, awork rest blade for supporting a work piece in operative relation to thegrinding wheel, and a pair of cam shaped members, one for shifting thework relative to the grinding wheel to effect a 'Stock removal therefromand effect and control the rotation thereof and the second memberforshifting the work support simultaneously with the shifting of the workrelative to the wheel.

15. In a grinding machine for grinding cylindrical work pieces thecombination of a bed, a grinding wheel rotatably mounted on said bed, awork rest blade for supporting a work piece in operative relation to thegrinding wheel, a pair of cam shaped members, one for shifting the workrelative to the grinding wheel to effect a stock removal therefrom andeffect and control the rotation thereof and the second member forshifting the work support simultaneously with the shifting of the workrelative to the wheel, and yieldable means for holding the work incontact with the work rest blade and said work feeding and rotationcontrol cam member.

16. In a grinding machine for grinding cylindrical work pieces thecombination of a bed, a grinding wheel rotatably mounted on said bed, awork rest blade for supporting a work piece in operative relation to thegrinding wheel, a pair of cam shaped members, one for shifting the workrelative to the grinding wheel to effect a stock removal therefrom andefiect and control the rotation thereof and the second member forshifting the work support simultaneously with the shifting of the workrelative to the wheel, yieldable means for holding the work in contactwith the work rest blade and said work feeding and rotation control cammember, and means for intermittently supplying work pieces to the workrest blade.

17. In a grinding machine of the class described for grinding theterminal portion of a circular work piece the combination of a bed, agrinding wheel rotatably mounted thereon and having an operative sideface, a work rest blade laterally spaced with respect thereto formovement transversely of the said lateral face, a rotatable frictioncontrol and feeding member in tandem relation with the blade, saidfriction control and feed member having a cam shaped peripheral surfacefor effecting said feed, and a cam member substantially co-axial withthe friction control and feed member and rotatable in timed relationtherewith for effecting the transverse movement of the blade relative tothe wheel simultaneously with the shifting of the work.

18. In a grinding machine of the class described for grinding theterminal portion of a circular work piece the combination of a bed, agrinding wheel rotatably mounted thereon and having an operative sideface, a work rest blade having an operative side face, a work rest bladelaterally spaced with respect thereto, for movement transversely of thesaid lateral face, a rotatable friction control and feeding member intandem relation with the blade, said friction 5 control and feed memberhaving a cam shaped peripheral surface for effecting said feed, a cammember substantially co-axial with the friction control and feed memberand'rotatable in timed relation therewith for effecting the transversemovement of the blade relative to the wheel simultaneously with theshifting of the work, and yieldably actuated means for holding the workin peripheral engagement with thework rest blade and rotation controlmember.

19. In a grinding machine of the class described for grinding theterminal portion of a circular work piece the combination of a bed, agrinding wheel rotatably mounted thereon and 20 laterally spaced withrespect thereto for movement transversely of the said lateral face, a rotatable friction control and feeding member in tandem relation with theblade, said friction control and feed member having a cam shapedperipheral surface for effecting said feed, a cam member substantiallyco-axial with the friction control and feed member and rotatable intimed relation therewith for effecting the transverse movement of theblade relative to the wheel simultaneously with the shifting of thework, yieldably actuated means for holding the work in peripheralengagement with the work rest blade and rotation control member, andmeans for intermittently supplying work pieces to the work rest blade.

20. In a grinding machine of the class described for grinding theterminal portion of a circular work piece the combination of a bed, agrinding wheel rotatably mounted thereon and having an 40 operative sideface, a work rest blade laterally spaced with respect thereto formovement transversely of the said lateral face, a rotatable frictioncontrol and feeding member in tandem relation with the blade, saidfriction control and feed' 5 member having a cam shaped peripheralsurface for effecting said feed, a cam member substantially co-axialwith the friction control and feed member and rotatable in timedrelation therewith for efiecting the transverse movement of the bladerelative to the wheel simultaneously with the shifting of the work,yieldably actuated means for holding the work in peripheral engagementwith the work rest blade and rotation control member, means forintermittently supplying work pieces to the work rest blade, and meansfor rendering the yieldable holding means inoperative during thesupplying of work pieces to the blade.

GEORGE w. BINNS.

